Szcześniak E, Głowinkowski S, Suchański W, Jurga S
Institute of Physics, A. Mickiewicz University, Poznań, Poland.
Solid State Nucl Magn Reson. 1997 Apr;8(2):73-9. doi: 10.1016/s0926-2040(96)01292-1.
Spin-lattice relaxation times T1 and nuclear Overhauser effect (NOE) enhancement factors for the individual ring carbons in di-n-butyl phthalate (DBF) show that the reorientational correlation function corresponding to the global dynamics in supercooled liquid can be described by a Davidson-Cole distribution. Measurements of proton spin-lattice relaxation times T1 and T1p, as well as 1H NMR spectra at temperatures below the glass transition temperature, Tg, reveal that the same distribution holds also for description of local dynamics in glassy DBF. The activation parameters of the motions detected are derived.
邻苯二甲酸二正丁酯（DBF）中各个环碳的自旋 - 晶格弛豫时间T1和核Overhauser效应（NOE）增强因子表明，对应于过冷液体中全局动力学的重取向相关函数可以用戴维森 - 科尔分布来描述。在低于玻璃化转变温度Tg的温度下对质子自旋 - 晶格弛豫时间T1和T1p以及1H NMR谱的测量表明，相同的分布也适用于描述玻璃态DBF中的局部动力学。推导了所检测到的运动的活化参数。
